Shorting Fees Are Inversely Proportional to Forward Returns? from Kora Reddy
I'm not sure which prof (Charles or Alex) was mentioning shorting the cost of certain stock at 60% ++ in one of the posts, but I found this interesting paper on the subject: "The Shorting Premium and Asset Pricing Anomalies".
Here is a two line summary of the paper:
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The cheap-minus-expensive-to-short (CME) portfolio of stocks has an average monthly gross return of 1.45%, a 0.92% net return, and a 1.55% four-factor alpha
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Top decile stocks by shorting premium (cheap to short) returned an average of 0.75% (gross) and 0.11 % (net) in the next one month, while bottom decile (expensive to short) returned -0.71% (gross) and -0.17% (net).